Appears Youtube has changed code, and script no longer works

About: Download YouTube Videos as MP4
It appears Youtube has changed code, so this script no longer works. I had used it quite regularly, and I know it was working as recently as a few days ago, so any changes are quite recent.


  • it works fine for me, so you're probably seeing an experimental interface. it would be useful if you could send the cookie value for VISITOR_INFO1_LIVE. in chrome, go to, click the green lock icon from the address bar, click "show cookies and site data", expand from the list, then select VISITOR_INFO1_LIVE from the list of cookies and copy the content value.